As long as you registered the trademark this first of all is your legitimacy - that's why you register it. This registration has been opposed so I assume now P

As long as you registered the trademark this first of all is your legitimacy - that's why you register it. This registration has been opposed so I assume now PSF via their UK counsellor will add some evidence to the opposition. If the opposition is successful it can turn out that owners of pythong.co.uk will not be able to get the trademark registration into a successful status. So right now, they don't need to defend anything, it's more or less that they are opposed. Which is why the PSF needs your help to find evidence and show how the name actually is and was used to finally show probably either that: - the EU trademark belongs to PSF (or elseone PYTHON related) - the name can not be trademarked at all in that class because it has its distinct, public meaning in internet/computing.